Molded plastic arch unit for a culvert or bridge



FIG. 1 is a perspective view of a molded plastic arch unit for a culvert or bridge showing our new design;

FIG. 2 is a side view, the opposite side view being a mirror image;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is an end view thereof; and,

FIG. 6 is an opposite end view. 

The ornamental design for a molded plastic arch unit for a culvert or bridge, as shown and described. 